<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        *{
            margin: 0px;
            padding: 0px;
            box-sizing: border-box;
        }
        body{
            background: url("img/register_bg.png") no-repeat center;
            padding-top: 25px;
        }

        .rg_layout{
            width: 900px;
            height: 500px;
            border: 8px solid #EEEEEE;
            background-color: white;
            /*让div水平居中*/
            margin: auto;
        }

        .rg_left{
            /*border: 1px solid red;*/
            float: left;
            margin: 15px;
        }
        .rg_left > p:first-child{
            color:#FFD026;
            font-size: 20px;
        }

        .rg_left > p:last-child{
            color:#A6A6A6;
            font-size: 20px;

        }


        .rg_center{
            float: left;
            /* border: 1px solid red;*/

        }

        .rg_right{
            /*border: 1px solid red;*/
            float: right;
            margin: 15px;
        }

        .rg_right > p:first-child{
            font-size: 15px;

        }
        .rg_right p a {
            color:pink;
        }

        .td_left{
            width: 100px;
            text-align: right;
            height: 45px;
        }
        .td_right{
            padding-left: 50px ;
        }

        #username,#password,#email,#name,#tel,#birthday,#checkcode{
            width: 251px;
            height: 32px;
            border: 1px solid #A6A6A6 ;
            /*设置边框圆角*/
            border-radius: 5px;
            padding-left: 10px;
        }
        #checkcode{
            width: 110px;
        }

        #img_check{
            height: 32px;
            vertical-align: middle;
        }

        #btn_sub{
            width: 150px;
            height: 40px;
            background-color: #FFD026;
            border: 1px solid #FFD026 ;
        }
        #td_bt{
            padding-left: 150px;
        }
        .error{
            color: red;
        }

    </style>

</head>
<body>

<div class="rg_layout">
    <div class="rg_left">
        <p>新用户注册</p>
        <p>USER REGISTER</p>

    </div>

    <div class="rg_center">
        <div class="rg_form">
            <!--定义表单 form-->
            <form action="#"  id="form"  method="get">
                <table>
                    <tr>
                        <td class="td_left"><label for="username">用户名</label></td>
                        <td class="td_right"><input type="text" name="username" id="username" placeholder="请输入用户名">
                         <span  id="s_username"  class="error"></span>
                        </td>
                    </tr>

                    <tr>
                        <td class="td_left"><label for="password">密码</label></td>
                        <td class="td_right"><input type="password" name="password" id="password" placeholder="请输入密码">
                            <span  id="s_password"  class="error"></span>
                        </td>
                    </tr>

                    <tr>
                        <td class="td_left"><label for="email">Email</label></td>
                        <td class="td_right"><input type="email" name="email" id="email" placeholder="请输入邮箱"></td>
                    </tr>

                    <tr>
                        <td class="td_left"><label for="name">姓名</label></td>
                        <td class="td_right"><input type="text" name="name" id="name" placeholder="请输入姓名"></td>
                    </tr>

                    <tr>
                        <td class="td_left"><label for="tel">手机号</label></td>
                        <td class="td_right"><input type="text" name="tel" id="tel" placeholder="请输入手机号"></td>
                    </tr>

                    <tr>
                        <td class="td_left"><label>性别</label></td>
                        <td class="td_right">
                            <input type="radio" name="gender" value="male"> 男
                            <input type="radio" name="gender" value="female"> 女
                        </td>
                    </tr>

                    <tr>
                        <td class="td_left"><label for="birthday">出生日期</label></td>
                        <td class="td_right"><input type="date" name="birthday" id="birthday" placeholder="请输入出生日期"></td>
                    </tr>

                    <tr>
                        <td class="td_left"><label for="checkcode" >验证码</label></td>
                        <td class="td_right"><input type="text" name="checkcode" id="checkcode" placeholder="请输入验证码">
                            <img id="img_check" src="img/verify_code.jpg">
                        </td>
                    </tr>


                    <tr>
                        <td colspan="2" id="td_bt"><input type="submit" id="btn_sub" value="注册"></td>
                    </tr>
                </table>

            </form>


        </div>

    </div>

    <div class="rg_right">
        <p>已有账号?<a href="#">立即登录</a></p>
    </div>


</div>
<script>
    window.onload = function(){//等待页面加载
        document.getElementById("form").onsubmit = function(){
//获取表单对象
            return checkUsername()&&checkPassword();//返回用户名和密码校验结果
        }
        document.getElementById("username").onblur=checkUsername;
        //给用户名绑定失去焦点事件
        document.getElementById("password").onblur=checkPassword;
//  给密码绑定失去焦点事件
        function checkUsername(){//定义校验用户名方法
            var username = document.getElementById("username").value;
            //获取用户名对象值
            var   rg_username=/^\w{6,12}$/;//定义用户名校验正则表达式规则
            var flag = rg_username.test(username);
            //使用正则表达式对象调用test方法对用户名进行校验
            var s_username = document.getElementById("s_username");
            //获取用户名后的span标签对象以便对其进行修改
            if(flag){//
                s_username.innerHTML="<img  width='35px' height='25px' src='../img/gou.png'>";
                //如果用户名满足正则表达式的要求则设置一张图片使用document的innerHtml方法进行内容的设定
            }else{//
                s_username.innerHTML="用户名错误";//
            }
            return flag;//
        }
        function  checkPassword(){//
            var password = document.getElementById("password").value;
            //
            var  reg_password=/^\w{6,12}$/;//
            var flag = reg_password.test(password);//
            var s_password = document.getElementById("s_password");//
            if(flag){//
                s_password.innerHTML="<img height='25' width='35' src='../img/gou.png'>";
                //
            }else{
                s_password.innerHTML="密码格式错误";//
            }
            return flag;//
        }

    }
</script>
</body>
</html>